Properties of Tobacco Yellow Dwarf and Bean Summer Death Viruses

Thomas, J. E.; Bowyer, J. W.

doi:10.1094/phyto-70-214

Cited by 34 publications

(19 citation statements)

References 6 publications

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“…Firstly, the infectious unit of the genome comprises as showing that a bipartite genome is not a common feature of only a single DNA component analogous to DNA 1. On the basis of the similarities of genome organisation between BCTV and other geminiviruses and the fact that the majority of geminiviruses, including the serologically related tobacco yellow dwarf virus (Thomas and Bowyer, 1980), have a single predominant coat protein, it is suggested that the presence of two coat protein species reflects a mixed population within the native virus isolate rather than translational strategy or post-translational modification. Secondly, the putative coat genome length of only 2993 nucleotides, this places BCTV among protein of BGTV is more closely related to those of leafhopperthe smallest viral pathogens of eukaryotes.…”

Section: Discussionmentioning

confidence: 99%

The nucleotide sequence of an infectious clone of the geminivirus beet curly top virus

et al. 1986

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A number of infectious clones of a Californian isolate of the leafhopper‐transmitted geminivirus beet curly top virus (BCTV) have been constructed from virus‐specific double‐stranded DNA isolated from infected Beta vulgaris and used to demonstrate a single component genome. The nucleotide sequence of one infectious clone has been determined (2993 nucleotides). Comparison with other geminiviruses has shown that the organisation of the genome closely resembles DNA 1 of the whitefly‐transmitted members. The four conserved coding regions of DNA 1 have highly homologous counterparts in BCTV with the exception of the putative coat protein which is more closely related to those of the leafhopper‐transmitted geminiviruses suggesting a strong interrelationship between coat protein and insect vector. A BCTV component equivalent to DNA 2 is not required for virus infection or transmission and has not been isolated from infected plants.

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Section: Discussionmentioning

confidence: 99%

The nucleotide sequence of an infectious clone of the geminivirus beet curly top virus

et al. 1986

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“…DISCUSSION Serology or amino acid composition of capsid proteins are commonly used to suggest phylogenies of plant viruses (Shukla & Ward, 1988;Fauquet et al, 1986). Serological studies of geminiviruses have shown that whitefly-transmitted geminiviruses are related sufficiently to cross-react with polyclonal and monoclonal antisera; however, there is a general lack of serological cross-reactivity among leafhopper-transmitted geminiviruses (Roberts et al, 1984), with the exceptions of MSV and DSV (Dollet et al, 1986) and BCTV and tobacco yellow dwarf virus (Thomas & Bowyer, 1980). No antigenic cross-reactivity has been substantiated between whitefly-and leafhopper-transmitted geminiviruses (Thomas et al, 1986).…”

Section: Comparison Of Coat Proteinsmentioning

confidence: 99%

Phylogeny of Geminiviruses

Howarth

Vandemark²

1989

Journal of General Virology

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SUMMARYAmino acid sequences of 16 geminivirus replication-associated proteins and 15 coat proteins were aligned and a new computer program was used to calculate the minimum mutation distances for all possible pairwise comparisons. These data were used to construct phylogenetic trees. Trees based on coat proteins had two main branches which were positively correlated with vector specificities of the viruses. Trees based on replication-associated proteins also had two main branches which were positively correlated with viral host specificities for either monocotyledonous or dicotyledonous plants. Therefore, evolutionary pressures on coat proteins and replication-associated proteins are probably highly influenced by vectors and hosts, respectively. Geminiviruses that infect dicotyledonous plants may be divided further by geographical origins into Old World and New World viruses. These results suggest the possible geographical origins of some geminiviruses, that new taxa should be erected, and have implications for distinguishing viruses and strains.

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“…Of these viruses, ACMV, BGMV, SLCV and TomGMV are transmitted by the whitefly Bemisia tabaci, whereas the others have leafhopper vectors. The only serological relationship reported among leafhoppertransmitted geminiviruses is that between BCTV and tobacco yellow dwarf virus (TYDV; Thomas & Bowyer, 1980).…”

Section: Introductionmentioning

confidence: 99%

Serological Relationships and Genome Homologies among Geminiviruses

Roberts¹,

Robinson²,

Harrison³

1984

Journal of General Virology

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SUMMARYIn immunosorbent electron microscopy (ISEM) tests, strong relationships were detected between five whitefly-transmitted geminiviruses: African cassava mosaic (ACMV), bean golden mosaic, euphorbia mosaic, squash leaf curl and tomato golden mosaic. Among five leafhopper-transmitted geminiviruses, beet curly top and tobacco yellow dwarf viruses were distantly related but no relationship was detected between either chloris striate mosaic, maize streak or wheat dwarf viruses and any of the other four. No relationship was detected between any whitefly-transmitted and any leafhopper-transmitted virus. A similar pattern of relationships was found by spot hybridization experiments in which extracts from infected leaves were tested with probes for ACMV DNA-1 or DNA-2. Imperfect nucleotide sequence homologies were found between ACMV DNA-1, which contains the particle protein gene, and the DNA of five other whitefly-transmitted viruses: bean golden mosaic, tomato golden mosaic, tobacco leaf curl, tomato leaf curl and tomato yellow leaf curl, the last three of which are not sap-transmissible. Thus, relationships were established between saptransmissible and sap non-transmissible geminiviruses. No homologies were detected with a full-length probe for ACMV DNA-2. Extracts from plants infected with three teafhopper-transmitted viruses (beet curly top, maize streak and wheat dwarf) did not react with probes for ACMV DNA-1 or DNA-2. Because each of the leafhoppertransmitted geminiviruses has a different vector species whereas the whiteflytransmitted geminiviruses all have the same vector, Bemisia tabaci, the genome homologies and antigenic relationships detected among members of the group could be explained if their coat proteins have a key role in transmission by vectors.

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Properties of Tobacco Yellow Dwarf and Bean Summer Death Viruses

Cited by 34 publications

References 6 publications

The nucleotide sequence of an infectious clone of the geminivirus beet curly top virus

The nucleotide sequence of an infectious clone of the geminivirus beet curly top virus

Phylogeny of Geminiviruses

Serological Relationships and Genome Homologies among Geminiviruses

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